Explore an astrophysical classic describing the effect of the Universe’s expansion on the seeds of galaxies.
High resolution computational simulations are a valuable means by which Astronomers test our understanding of the Universe, and make predictions. The world of computational astrophysics broke new ground recently with the highest resolution cosmological simulation to date, Illustris, making for some spectacular science and some spectacular images.
New results from stacked weak lensing measurements of over a hundred thousand galaxies show that, on large scales, light from stars appears to trace the dark matter distribution of the Universe remarkably well.
Measurements of the circular velocities in groups of galaxies can test whether our current cosmology is correct.
A galaxy cluster in the act of forming reveals some interesting details about the lives of galaxies.
Astronomers map out the local universe in a way that is both intuitive and fascinating, marking the birth of the new science of “Cosmography”.
A classic 1972 paper by Jim Gunn and J. Richard Gott, III describing the growth of clusters from primordial density perturbations and, most famously, the importance of ram pressure stripping in explaining the observed lack of spiral galaxies towards the center of clusters.
What were astronomers reading and talking about in their research last year? Check out figures from the top 12 most-cited astronomy papers from 2012 (so far) and find out what researchers were up to and why!
I recently attended a two-week crash course in the “Astrophysical Applications of Gravitational Lensing”. In this post, I overview a few of the ways astronomers employ lensing to study the Universe, from extrasolar planets to distant quasars and large-scale structure.
Title: Spatial Anisotropy of Galaxy Kinematics in Sloan Digital Sky Survey Galaxy Clusters First Author: Skielboe, A. Galaxy clusters are beautifully simple, but also fantastically complicated structures. For many years, astronomers have treated these systems as spherical cows, but simulations and observations have repeatedly shown that clusters exhibit triaxial rather than spherical shapes with nice […]